121420402222021 has 16 divisors (see below), whose sum is σ = 143552317213440. Its totient is φ = 100485078180480.

The previous prime is 121420402221983. The next prime is 121420402222039. The reversal of 121420402222021 is 120222204024121.

It is not a de Polignac number, because 121420402222021 - 2²⁵ = 121420368667589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121420402222081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24989281 + ... + 29450041.

It is an arithmetic number, because the mean of its divisors is an integer number (8972019825840).

Almost surely, 2^{121420402222021} is an apocalyptic number.

It is an amenable number.

121420402222021 is a deficient number, since it is larger than the sum of its proper divisors (22131914991419).

121420402222021 is a wasteful number, since it uses less digits than its factorization.

121420402222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4594884.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 121420402222021 its reverse (120222204024121), we get a palindrome (241642606246142).

The spelling of 121420402222021 in words is "one hundred twenty-one trillion, four hundred twenty billion, four hundred two million, two hundred twenty-two thousand, twenty-one".